Amplifying tone chamber for horns



Nov. 2 1927. 1,650,976

J. BERG AMPLIFYING TONE CHAMBER FOR HORNS Filed June 1' 1925 Patented Nov. 29, 1927.

JOSEPH BERG, F LONG ISLAND CITY, NEW YORK.

AMPLIFYING TONE GI'IAMBEB FOR I-IORNS.

Application filed June 17, 1925. Serial No. 37,709.

This invention relates to sound amplifying horns or means for phonographs or talking machines, radio or the like, though it is noted that the invention is not limited to any of these.

'One object of the invention is to provide a phonograph or device of this kind having an efficient and practical sound horn embodied therein.

Another object of the invention is to provide a sound horn of this kind which is easily manufactured and which is made entirely of wood, giving excellent tone qualities.

Another object of the invention is to provide an apparatus or device of this kind in which the sound horn discharges its sound upwardly through the top board of the instrument box where it can be closed or the sound thereof modified by the action of the lid.

, Other objects of the invention are to im prove generally the simplicity, efiiciency, strength and compactness of such devices and to provide a device or apparatus of this kind which is durable, economical to manufacture and simple to operate, which will not get out of order, and which has excellent tone qualities.

Still other objects of the invention will appear as the description proceeds; and while herein details of the invention are described, the invention is not limited to these since many and various changes may be made without departing from the scope of the invention as claimed.

The inventive features for the accomplishment of these and other objects are shown herein in connection with an improved phonograph which, briefly stated,-includes a box including a top board provided with a receiving opening receiving the tone arm, and in one corner with a large sound emitting opening. A block in contact with said top board is provided. with a sound passage extending from said receiving opening and out through the front of the block to form a sound outlet; and a side wall and an upwardly inclined deflector board cooperate with adjacent walls of the box to form a sound horn extending from the edges of said outlet to the edges of said large opening for deflecting the sound upwardly from said large opening. I

In accompanying drawing, showing by way of example, one of many possible embodiments of the invention.

Fig. 1 is a fragmental plan, partly in section, showing the phonograph with its lid removed; and

Fig. 2 is a transverse vertical sectional View, partly in elevation, showing the sound passage block and associated parts, said section being taken on the line 22 of Fig. .1, jooking in the direction of the arrow of said The various parts of my device are carried in and on a slightly elongated rectangular box comprising a bottom board or base 5 (Fig. 2) and imperforate front, back and end walls 6, 7 8 and 9 (Fig. 1) tall enough to afford housing for the phonograph motor (not shown).

A top board 10 is fitted in said box just below the upper edges of said walls, over which the sound record 11 is disposed in one corner thereof. The opposite end of the top board is provided in the opposite corner 14 (Fig. 1) from the record with a round sound receiving opening 15 (Fig. 2) and near the front wall with a large sound emitting opening 16 extending to the front wall and adjacent end wall and terminating in a straight rear edge 17 (Fig. 1) parallel to the rear wall 7 a short distance from the round .1

opening 15 and in a curved edge 18 near and concentric with the edge of the record.

A tone arm 20 passing into and pivoted at said round opening 15 carries a diaphragm box 21 movable over the record. A lid 22 hinged at 23 to the rear wall and comprising a top member and side members is tall enough to afford housing for the tone arm.

A rectangular block 25 (Fig. 1) resting in said opposite corner 14 in contact with the adjacent walls 7 and 9 and the base and top board terminates frontwardly at said straight edge 17 and extends at the inner end 26 toward the opposite end of the box to a pointabout even with the center of the record.

Said block 25 is provided with a sound pas-- sage 27 extending with gradually increasing cross section and height from said round opening 15 slightly downwardly and then extending with a slight inclination as at 28 toward the rear wall 7 to a point near said inner end 26 where it describes a wide loop 129 and then extends toward the enter end, leaving a partition 30, and passes through lid said front face to form, under said straight edge 17, a large sound outlet 31 extending substantially from said top board 10 almost to the bottom board, there to form a narrow shoulder 82 (Fig. 2) at said. bottom board.

A curved wall 35 litting between said curved edge 18 and the bottom board 5 extends from said front wall 6 to the block 25; and a sounddeflector-board 36 is fitted between said curved wall. 35 and the adjacent end wall 9 and extends from said narrow shoulder 32 to the upper part of the front wall.

All of the parts herein mentioned except the tone arm 20 and diaphragm box 21 are preferably made of wood, though similar or other suitable material may be used. The machine is operated in the ordinary way. The passage 27, curved wall 35, deflector board 38, and the adjacent end wall 9 form a sound horn of gradually increasing crosssection from said round opening 15 to said large emitting opening 16. The sound from the diaphragm box 21 passes through the tone arm 20, to the small end of the passage 27, thence through said passage and the sound outlet 31 and is deflected upwardly and out into the room by the deflector board, when the lid 22 is open.

The tone volume may be reduced and regulated by entirely or nearly closing the lid, though the invention is not limited to the presence or absence of the lid.

I claim as my invention:

1. In combination, a box containing a top board over which a sound record is disposed; said board being provided with a receiving opening and in one corner with a large sound emitting opening terminating rearwardly near said receiving opening and laterally in a curved edge near and concentric with the record; and a block in said box in contact with said top board provided with a sound passage extending from said receiving opening and out through the front face of the block to form a sound outlet; a curved wall between said curved edge and the base of the box extending to the inner edge of said outlet; a deflector board between said curved face and the adjacent wall of the box and extending from the lower edge of said outlet to near the part of said large opening opposite to said block; and a tone arm leading into said receiving opening.

2. In combination, a box comprising a bottom board and front, back and end walls and a top board over which a sound record is disposed in one corner thereof near the front wall; said top board being provided in the opposite corner with a receiving opening and near the front wall with a large sound emitting opening extending in the adjacent walls and terminating in a straight edge parallel to the rear wall near the receiving opening and in a curved edge near and concentric to the edge of the record: a rectangular block resting in said opposite corner in contact with the base and top board and adjacent walls and terminating frontwardly in a front face at said straight edge and extending at the inner end toward the opposite end of the box; said block being provided with a sound passage extending with gradually increasing cross-section from said round opening slightly down wardly and then to near said inner end where it describes a loop and extends toward the outer end of the block and passes through said front face to form alarge rectangular box comprising a bottom board or base and upstanding iinperforate front back and end walls tall enough to afford housing for a phonograph motor; a top board fitting in said box just below the upper edges of said upstanding walls and over which the sound record is disposed in one corner thereof; the opposite end of the top board being provided in the opposite corner from the record with a round sound receivin opening and near the front wall with a large sound emitting opening extending to the front and adjacent end wall and terminating in a straight rearedgeparallel to the rear wall a short distance from the round Opening and in accurved edge near and concentric with the edge of the record; and a block in said opposite corner and extending to the rear of the center of the rec-- 0rd and to said straight edge and provided with a sound passage extending from said receiving opening and out through the'front face of the block to form a sound outlet; and means'cooperating with walls of the box to form a sound horn extending from thefedges of said outlet to the edges of said large openin Y 4:. In combination, a box including bottom board and a top board provided with a receiving opening and in one corner-with a large sound emitting opening having acurved inner side edge and a straight rear edge; a block in said box in contact with said top board and provided with a sound passage extending from said receiving opening and out through the front of the block to form a sound outlet forming a narrow shoulder at the lower edge; a curved wall fitting between said curved edge and the bottom board and between the frontwall of the box and the block; and a sound deflectorboard fitting between said curved wall and.

the opposite wall of the box and extending from said narrow shoulder to near the upper edge of the front wall of the box; said passage, curved wall, deflector board, and said opposite wall forming a sound horn of gradually increasing cross-section from said receiving opening to said large sound emitting opening; all of the parts herein mentioned being made of wood.

5. In combination, an enlongated rectangular box including a top board provided with a sound receiving opening in a corner thereof, sound emitting opening having a rear straight edge; a rectangular block rest ing in said corner in contact with the adjacent walls and the top board and terminating frontwardly at said straight edge and extending at the inner end toward the opposite end of the box; said block being provided with a sound passage extending with gradually increasing cross section and height from said receiving opening slightly downwardly and then extending with a slight inclination toward the rear wall of the box to a point near said inner end where it describes a wide loop and extends toward the outer end and passes through said front face to form a large sound outlet under said straight edge extending from said top board almost to the bottom of the box; and means cooperating with walls of the box to form a sound horn extending from said outlet to said large opening.

6. In combination, a box including a top board provided with a sound receiving opening and in one corner with a large sound emitting opening; a block in contact with said top board and provided in its top face with a receiving opening registering with said sound receiving opening, and a sound passage extending from said receiving openings downwardly and laterally and then folded upon itself and extended out through the front of the block to form a sound outlet; and means to form a sound horn extending from the edges of said outlet to the edge of said large opening.

7 In combination, a box including a top board provided in one corner with a sound receiving opening and in another corner with a large sound emitting opening; a rectangular block fitting in said first named corner in contact with and bracing the walls and bottom of the box and said top board and provided with a sound passage having a sound inlet registering with said receiving opening, said passage extending from said receiving opening and out through the front of the block to form a sound outlet separated from said inlet passage being completel laterally closed between said outlet and inlet; and means to form a sound horn extending from the edges of said outlet to the edge of said large opening.

8. In combination, a box including a top board provided with a sound receiving opening near one corner in another corner with a large sound emitting opening remote from said receiving opening; and means in said box forming a sound passage of gradually increasing cross-section extending from said receiving opening to the large opening; said sound passage being completely laterally closed between said openings.

9. In combination, a box including a top board provided with a sound receiving opening and in one corner with a large sound emitting opening; and a one piece block in contact with said top board and provided with an inlet registering with said receiving opening and a sound passage extending from said inlet out through the front of the block to form a sound outlet; said outlet and inlet being separated, the passage being entirely laterally closed between said inlet and outlet; and means forming a sound horn extending from the edges of said outlet to the edge of said large opening.

JOSEPH BERG. 

